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May 14, 2018 08:55
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A phoenix release task to run migration. It's a modified version of the one found on the official [Distillery documentation](https://hexdocs.pm/distillery/running-migrations.html)
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# ... | |
release :my_app do | |
# ... | |
set( | |
applications: [ | |
:runtime_tools, | |
my_app: :permanent | |
] | |
) | |
set( | |
commands: [ | |
migrate: "rel/commands/migrate.sh" | |
seed: "rel/commands/seed.sh" | |
] | |
) | |
end |
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defmodule MyApp.ReleaseTasks do | |
@start_apps [ | |
:crypto, | |
:ssl, | |
:postgrex, | |
:ecto | |
] | |
@app :my_app | |
@repos Application.get_env(@app, :ecto_repos, []) | |
def migrate do | |
start_services() | |
run_migrations() | |
stop_services() | |
end | |
def seed do | |
start_services() | |
run_migrations() | |
run_seeds() | |
stop_services() | |
end | |
defp start_services do | |
IO.puts("Loading #{@app}..") | |
# Load the code for myapp, but don't start it | |
:ok = Application.load(@app) | |
IO.puts("Starting dependencies..") | |
# Start apps necessary for executing migrations | |
Enum.each(@start_apps, &Application.ensure_all_started/1) | |
# Start the Repo(s) for app | |
IO.puts("Starting repos..") | |
Enum.each(@repos, & &1.start_link(pool_size: 1)) | |
end | |
defp stop_services do | |
IO.puts("Success!") | |
:init.stop() | |
end | |
defp run_migrations do | |
Enum.each(@repos, &run_migrations_for/1) | |
end | |
defp run_migrations_for(repo) do | |
app = Keyword.get(repo.config, :otp_app) | |
IO.puts("Running migrations for #{app}") | |
migrations_path = priv_path_for(repo, "migrations") | |
Ecto.Migrator.run(repo, migrations_path, :up, all: true) | |
end | |
defp run_seeds do | |
Enum.each(@repos, &run_seeds_for/1) | |
end | |
defp run_seeds_for(repo) do | |
# Run the seed script if it exists | |
seed_script = priv_path_for(repo, "seeds.exs") | |
if File.exists?(seed_script) do | |
IO.puts("Running seed script..") | |
Code.eval_file(seed_script) | |
end | |
end | |
defp priv_path_for(repo, filename) do | |
app = Keyword.get(repo.config, :otp_app) | |
repo_underscore = | |
repo | |
|> Module.split() | |
|> List.last() | |
|> Macro.underscore() | |
priv_dir = "#{:code.priv_dir(app)}" | |
Path.join([priv_dir, repo_underscore, filename]) | |
end | |
end |
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